Presentations of three specialists working in the clinical areas involving the phenomenon of perversity. Estela Welldon is a psychoanalytical psychotherapist who worked at the Tavistock Portman Clinics NHS Trust. Presently she is in private practice and lectures worldwide. Fiona Ross has had a long career as a psychologist and Jungian psychoanalyst working in a variety of clinical and institutional settings. She has a particular interest in perverse states of mind and is the author of two books on this subject. Anna Motz is Consultant Clinical and Forensic Psychologist in Oxford, an Adult Psychotherapist and past president of the International Association for Forensic Psychotherapy. She works within the forensic services with perpetrators and victims of violence and perversion.